Frank Shannon was an Irish-born stage and screen performer. He had his film debut in The Prisoner of Zenda (1913). He is most fondly remembered as the brilliant Dr. Zarkov in the three Flash Gordon serials.
Dr. Hans Zarkov
Film 1936
Police Sergeant at Jail (Uncredited)
Film 1938
Sheriff Anderson
Film 1936
Dr. Zarkov
Film 1940
Captain Stafford
Film 1936
Mr. Holt
Film 1936
Prof. Davidson (uncredited)
Film 1943
Frank, the Bartender (uncredited)
Film 1939
Dr. Zarkov
Film 1938
Dr. Zarkov
Film 1966
Capt. McTavish
Film 1938
Terrence O'Malley
Film 1922
Captain McTavish
Film 1939
Inspector McTavish
Film 1939
Sweeney
Film 1940
Dan O'Reilly
Film 1936
Prison Warden
Film 1934
Hammond
Film 1941
The Burglar, Holtz aka Jack Dunning
Film 1931
McDowell
Film 1941
Desk Sergeant (uncredited)
Film 1937
Police Lieutenant
Film 1938
Police Sergeant
Film 1936
Leahy
Film 1935
Old Man (uncredited)
Film 1939
Minor Role (uncredited)
Film 1938
Dr. Hans Zarkov
Film 1938
Mac (uncredited)
Film 1938
Mike
Film 1935
Police Capt. McTavish
Film 1939
Construction Supervisor at Elevator
Film 1940
Second Man with California Gold News
Film 1940
Sheriff
Film 1940
Professor Davidson
Film 1943
Mr. O'Malley - Captain of the Nova Scotian (uncredited)
Film 1940
Detchard
Film 1913
Chaplain (uncredited)
Film 1936
Duke Slattery - Policeman with Warrant
Film 1938
Sir John Mansfield
Film 1922
Dr. Alexis Zarkov
Film 1938
Senator (uncredited)
Film 1942
Police Commissioner
Film 1942
Judge Bradford
Film 1924
Detective Hewitt (uncredited)
Film 1936
Police Captain McTavish (uncredited)
Film 1938
Dr. Hayden
Film 1943
Kelsey (Uncredited)
Film 1939
Police Chief at Lodge (uncredited)
Film 1935
Dr. Hans Zarkov (archive footage)
Film 1966
Mr. Farley
Film 1935
Film 1949
Badger
Film 1924
Train Station Gateman (Uncredited)
Film 1946